function reveal(type) {
	switch (type)
	{
		case 'home':
			document.getElementById("SubMenu_home").style.visibility="visible";
			document.getElementById("ClearSubMenu_home").style.visibility="visible";
			break;
		case 'about':
			document.getElementById("SubMenu_about").style.visibility="visible";
			document.getElementById("ClearSubMenu_about").style.visibility="visible";
			break;
		case 'players':
			document.getElementById("SubMenu_players").style.visibility="visible";
			document.getElementById("ClearSubMenu_players").style.visibility="visible";
			break;
		case 'contact':
			document.getElementById("SubMenu_contact").style.visibility="visible";
			document.getElementById("ClearSubMenu_contact").style.visibility="visible";
			break;
	}
}

function hide(type) {
	switch (type)
	{
		case 'home':
			document.getElementById("SubMenu_home").style.visibility="hidden";
			document.getElementById("ClearSubMenu_home").style.visibility="hidden";
			break;
		case 'about':
			document.getElementById("SubMenu_about").style.visibility="hidden";
			document.getElementById("ClearSubMenu_about").style.visibility="hidden";
			break;
		case 'players':
			document.getElementById("SubMenu_players").style.visibility="hidden";
			document.getElementById("ClearSubMenu_players").style.visibility="hidden";
			break;
		case 'contact':
			document.getElementById("SubMenu_contact").style.visibility="hidden";
			document.getElementById("ClearSubMenu_contact").style.visibility="hidden";
			break;
	}
}

function calculate_cost(unit_cost) {
	var display_days=document.getElementById("clubai_days_purchased").value;
	var total_cost=unit_cost*display_days;
	document.getElementById("sponsor_cost").value=total_cost;
	document.getElementById("payment_cost").value=total_cost;
}

function cl_calcSponsorAmt(amt) {
	var num_days=document.getElementById("clubai_days_purchased").value;
	amt_is = num_days*amt;
	new_amt_is = amt_is.toFixed(2);
	document.getElementById("sponsor_amount").innerHTML = "<b>£" + new_amt_is + "</b>";
	document.getElementById("sponsor_amount_2").innerHTML = "<b>£" + new_amt_is + "</b>";
}